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单词 photonasty
释义

photonasty


photonasty

(ˈfəʊtəʊˌnæstɪ) n, pl -ties (Botany) a nastic movement in response to a change in light intensity ˌphotoˈnastic adj

photonasty

the tendency in certain plant species to respond to light by developing sufficient cellular force or growth on one side of an axis to change the form or position of the axis, as in the opening and closing of the flowers of four-o’clocks. Cf. thermonasty.photonastic. adj.See also: Plants

Photonasty


Photonasty

 

the movement of plant organs, for example, leaves and petals, under the influence of undirected and spatially uniform illumination. Photonastic responses may include the opening and closing of flower corollas and anthodia. Photonasty occurs either as a result of accelerated growth or a change in the turgor of the cells on one side of an organ. It often depends on the combined influence of illumination and temperature; if, in such cases, movements of the organs are associated with the alternation of day and night, the responses are called nyctinastic.

photonasty


photonasty

responses in plants to variations in light.
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更新时间:2024/12/22 18:10:25